linux-kernel - Re: Linux 5.6-rc2

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Date:   Sun, 16 Feb 2020 21:08:40 -0500
From:   Dave Jones <davej@...emonkey.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Josef Bacik <josef@...icpanda.com>,
        Filipe Manana <fdmanana@...e.com>,
        David Sterba <dsterba@...e.com>
Subject: Re: Linux 5.6-rc2

On Sun, Feb 16, 2020 at 01:32:32PM -0800, Linus Torvalds wrote:

 > Outside of drivers, there's the usual smattering of changes all over.
 > Filesystems (nfs, ext4, ceph, cifs, btrfs), architecture updates (x86,
 > arm), and some core code (scheduling, tracing, networking, io_uring).
 > 
 > The shortlog is appended, you can get a feel for the details by scanning it.
 > 
 > Go forth and test,

This didn't happen in rc1, but showed up when I booted into rc2 and
tried to and pull some stuff with rsync.

[   70.794783] BUG: sleeping function called from invalid context at mm/slab.h:565
[   70.794834] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1141, name: rsync
[   70.794863] 5 locks held by rsync/1141:
[   70.794876]  #0: ffff888417b9c408 (sb_writers#17){.+.+}, at: mnt_want_write+0x20/0x50
[   70.795030]  #1: ffff888428de28e8 (&type->i_mutex_dir_key#13/1){+.+.}, at: lock_rename+0xf1/0x100
[   70.795051]  #2: ffff888417b9c608 (sb_internal#2){.+.+}, at: start_transaction+0x394/0x560
[   70.795124]  #3: ffff888403081768 (btrfs-fs-01){++++}, at: btrfs_try_tree_write_lock+0x2f/0x160
[   70.795203]  #4: ffff888403086568 (btrfs-fs-00){++++}, at: btrfs_try_tree_write_lock+0x2f/0x160
[   70.795222] CPU: 5 PID: 1141 Comm: rsync Not tainted 5.6.0-rc2-backup+ #2
[   70.795291] Hardware name: ASUS All Series/Z97-DELUXE, BIOS 3503 04/18/2018
[   70.795362] Call Trace:
[   70.795374]  dump_stack+0x71/0xa0
[   70.795445]  ___might_sleep.part.96.cold.106+0xa6/0xb6
[   70.795459]  kmem_cache_alloc+0x1d3/0x290
[   70.795471]  alloc_extent_state+0x22/0x1c0
[   70.795544]  __clear_extent_bit+0x3ba/0x580
[   70.795557]  ? _raw_spin_unlock_irq+0x24/0x30
[   70.795569]  btrfs_truncate_inode_items+0x339/0xe50
[   70.795647]  btrfs_evict_inode+0x269/0x540
[   70.795659]  ? dput.part.38+0x29/0x460
[   70.795671]  evict+0xcd/0x190
[   70.795682]  __dentry_kill+0xd6/0x180
[   70.795754]  dput.part.38+0x2ad/0x460
[   70.795765]  do_renameat2+0x3cb/0x540
[   70.795777]  __x64_sys_rename+0x1c/0x20
[   70.795788]  do_syscall_64+0x6d/0x6b0
[   70.795864]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   70.795876]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   70.795889] RIP: 0033:0x7f7fa39256d7
[   70.795965] Code: e8 6e e9 07 00 85 c0 0f 95 c0 0f b6 c0 f7 d8 5b c3 66 90 b8 ff ff ff ff 5b c3 66 0f 1f 84 00 00 00 00 00 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 89 d7 14 00 f7 d8 64 89 02 b8
[   70.795990] RSP: 002b:00007ffc8ad171a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
[   70.796070] RAX: ffffffffffffffda RBX: 00007ffc8ad19350 RCX: 00007f7fa39256d7
[   70.796084] RDX: 0000000000000000 RSI: 00007ffc8ad17350 RDI: 00007ffc8ad19350
[   70.796097] RBP: 00007ffc8ad17350 R08: 0000000000000000 R09: 0000000000000000
[   70.796170] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   70.796184] R13: 0000000000000004 R14: 00000000000081a4 R15: 0000000000000000